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Leukocoria (also white pupillary reflex) is an abnormal white reflection from the retina of the eye. Leukocoria resembles eyeshine , but leukocoria can also occur in animals that lack eyeshine because their retina lacks a tapetum lucidum .
The first sign is usually a painless reddening of the affected eye. [5] Whitening of the pupil, due to massive exhudation into the vitreous, is typical, leading to the hallmark "white pupil in a red eye". [1] Visual loss is rapid, taking hours or, at most, few days – two-thirds of the patients are already blind in the affected eye when ...
A complete physical examination is done to identify if a child has any associated systemic symptoms which may aid in a diagnosis of childhood cataracts. [4] In addition, a complete eye examination is done. [2] [4] This eye exam includes fixation, pupillary reflex test, and test for visual acuity. [4]
Symptoms typically begin as blurred vision, usually pronounced when one eye is closed (due to the unilateral nature of the disease). Often the unaffected eye will compensate for the loss of vision in the other eye; however, this results in some loss of depth perception and parallax. Deterioration of sight may begin in either the central or ...
Other symptoms include absence of direct light reflex, afferent pupillary defect, defective colour vision, decreased contrast sensitivity, generalized decrease in visual sensitivity etc. [6] Optic chiasm lesions
The most common and obvious sign of retinoblastoma is an abnormal appearance of the retina as viewed through the pupil, the medical term for which is leukocoria, also known as amaurotic cat's eye reflex. [5] Other signs and symptoms include deterioration of vision, a red and irritated eye with glaucoma, and
The pupillary reflex results in the pupil constricting (left) and dilating (right) These include the pupillary light reflex and accommodation reflex . Although the pupillary response , in which the pupil dilates or constricts due to light is not usually called a "reflex", it is still usually considered a part of this topic.
The pupillary light reflex (PLR) or photopupillary reflex is a reflex that controls the diameter of the pupil, in response to the intensity of light that falls on the retinal ganglion cells of the retina in the back of the eye, thereby assisting in adaptation of vision to various levels of lightness/darkness.